CN106786732A - A kind of alternating current-direct current microgrid group operation control test system - Google Patents
A kind of alternating current-direct current microgrid group operation control test system Download PDFInfo
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- 238000010248 power generation Methods 0.000 abstract description 8
- 238000004146 energy storage Methods 0.000 abstract description 7
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- H02J3/383—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
The present invention relates to a kind of alternating current-direct current microgrid group's operation control test system, the system includes：First direct-current micro-grid, the second direct-current micro-grid, the first exchange microgrid, the second exchange microgrid, first line impedance, the second line impedance, the first AC/DC converter, the second AC/DC converter, experimental power supply, alternating current-direct current energy router, multiterminal element converter and switch, and controlling switch is opened or closed state, alternating current-direct current microgrid group's operation control test environment is built；The system that the present invention is provided can realize the distributed generation technology and energy storage technology research platform of network reconfiguration, so as to carry out distributed power generation and storage energy operation control technology research.
Description
Technical field
The present invention relates to distributed power generation control technology field, and in particular to a kind of alternating current-direct current microgrid group operation control test
System.
Background technology
With continuing to develop for distributed generation technology DG, power distribution network gradually develops into active from passive type, and turns into
The important component of intelligent grid.The fluctuation of distributed photovoltaic power generation system is possible to trigger or deteriorate power distribution network end
Power quality problem, while its distribution power flow two-way flow for causing increased the complexity of operational management and Optimized Operation.
Energy-storage system can simultaneously provide active and reactive power support, and stabilization power network endpoint node voltage level improves distribution transformer fortune
Line efficiency, receiving ability of the enhancing power distribution network to distributed power source.
However, energy storage at present is not deep enough with distributed power source cooperation control technology research, carried for energy storage technology
The key technology of power distribution network distributed power generation permeability high also needs further investigation.With the typical DC with electric automobile as representative
Load continue to develop and photovoltaic DC source distribution formula power supply fast development, DC distribution, multiplexe electric technology will be obtained quickly
Development.It would therefore be highly desirable to propose that a kind of key technology research suitable for development distributed power generation incoming transport, direct current network is put down
Platform, breaks through photovoltaic distributed generating large-scale development technical bottleneck, grasps distributed power generation and controls skill with energy storage cooperation
Art, solves distribution to contradiction between distributed power generation digestion capability and power grid security and stability.
The content of the invention
The present invention provides a kind of alternating current-direct current microgrid group operation control test system, and network weight can be realized the purpose is to provide
The distributed generation technology of structure and energy storage technology research platform, so as to carry out distributed power generation be ground with storage energy operation control technology
Study carefully.
The purpose of the present invention is realized using following technical proposals：
A kind of alternating current-direct current microgrid group operation control test system, it is theed improvement is that, including：
First direct-current micro-grid, the second direct-current micro-grid, the first exchange microgrid, the second exchange microgrid, first line impedance, second
Line impedance, the first AC/DC converter, the second AC/DC converter, experimental power supply, alternating current-direct current energy router, multiterminal element
Converter and switch；
Wherein, the switch k1 that is sequentially connected, experimental power supply and switch k2 be parallel to power network bus and microgrid power supply buses it
Between, switch k3 be parallel to microgrid power supply buses and first exchange microgrid bus between, switch k4 be parallel to microgrid power supply buses with
Between second exchange microgrid bus, the tie point that switch k3 is exchanged between microgrid bus with first is sequentially connected First Line roadlock
Anti-, switch k5 and switch k4 are exchanged between microgrid bus with second, the switch k6 being sequentially connected and first exchange microgrid and first
Exchange microgrid bus is in parallel, and the switch k7 and the first AC/DC converter being sequentially connected are parallel to the first exchange microgrid bus and the
Between one direct-current micro-grid bus, the exchange microgrids of the switch k11 being sequentially connected and second exchange the parallel connection of microgrid bus with second, successively
The switch k10 and the second AC/DC converter of connection are parallel between the second exchange microgrid bus and the second direct-current micro-grid bus,
The switch k16 and the first direct-current micro-grid being sequentially connected are in parallel with the first direct-current micro-grid bus, the switch k17 being sequentially connected and second
Direct-current micro-grid is in parallel with the second direct-current micro-grid bus, the first direct-current micro-grid bus successively with the second line impedance, switch k13, many
End direct current transducer, switch k15 and the series connection of the second direct-current micro-grid bus, the one end for switching k8 exchanges microgrid bus simultaneously with first
Connection, the other end for switching k8 is connected with alternating current-direct current energy router, and the one end for switching k9 exchanges the parallel connection of microgrid bus with second, opens
The other end for closing k9 is connected with alternating current-direct current energy router, and alternating current-direct current energy router is changed by switching k14 with multiterminal element
Device is connected.
Preferably, the experimental power supply is AC/DC/AC power supplys, for receiving power network alternating current, and power network alternating current is passed through
After handing over straight exchange conversion, the alternating current of separately adjustable three-phase voltage/frequency is capable of in output.
Preferably, the power network bus, microgrid power supply buses, the first exchange microgrid bus and second exchange microgrid bus
Alternating voltage is 0.4kv, and the DC voltage of the first direct-current micro-grid bus is 400v, the direct current of the second direct-current micro-grid bus
Voltage is 800v.
Preferably, the alternating current-direct current energy router includes：First AC port, the second AC port, the 3rd exchange end
Mouth, the first AC/DC convertor, the second AC/DC convertor and DC converter, the first AC port become by the first alternating current-direct current
Parallel operation is in parallel with common DC bus, and the 3rd AC port is in parallel with common DC bus by the second AC/DC convertor, and second hands over
Flow port is in parallel with common DC bus by DC converter；
The multiterminal element converter includes：First DC port, the second DC port, the 3rd DC port, a DC/
DC converters, the 2nd DC/DC converters and the 3rd DC/DC converters, the first DC port, the second DC port and the 3rd direct current
Port is in parallel with common DC bus respectively through a DC/DC converters, the 2nd DC/DC converters and the 3rd DC/DC converters.
Further, the first direct-current micro-grid bus successively with the second line impedance, switch k13, multiterminal element converter
First DC port is connected, the second DC port of multiterminal element converter successively with switch k15 and the second direct-current micro-grid bus
Series connection, the 3rd DC port of multiterminal element converter is sequentially connected switch k14 and is exchanged with the second of alternating current-direct current energy router
Port, one end for switching k8 exchange that microgrid bus is in parallel with first, and the of the other end of switch k8 and alternating current-direct current energy router
One AC port is connected, and the one end for switching k9 exchanges the parallel connection of microgrid bus with second, switchs the other end and alternating current-direct current energy of k9
The 3rd AC port connection of router.
Further, the alternating current-direct current energy router, for by adjusting the first AC port and the 3rd AC port
Input power, control the power output of the second AC port, wherein, power output=the first of the second AC port exchange end
The input power of the AC port of input power+the three of mouth；
The alternating current-direct current energy router, is additionally operable to the input work by adjusting the second AC port and the 3rd AC port
Rate, controls the power output of the first AC port, wherein, the input of power output=the second AC port of the first AC port
The input power of the AC port of power+the three.
Further, the multiterminal element converter, for by adjusting the second DC port and the 3rd DC port
Input power, controls the power output of the first DC port, wherein, power output=the second DC port of the first DC port
The DC port of input power+the three input power；
The multiterminal element converter, is additionally operable to the input work by adjusting the first DC port and the 3rd DC port
Rate, controls the power output of the second DC port, wherein, the input of power output=the first DC port of the second DC port
The input power of the DC port of power+the three；
The multiterminal element converter, is additionally operable to the input work by adjusting the first DC port and the second DC port
Rate, controls the power output of the 3rd DC port, wherein, the input of power output=the first DC port of the 3rd DC port
The input power of the DC port of power+the second.
Preferably, controlling switch k1 builds the group's operation control of alternating current-direct current microgrid and surveys to the state that is opened or closed for switching k17
Test ring border.
Beneficial effects of the present invention：
(1) technical scheme that the present invention is provided, it is proposed that a kind of multiterminal element power network interconnects topology from different voltage Grids
Design, for interconnection provides research platform with energy scheduling between carrying out multi-voltage grade direct current network；
(2) technical scheme that the present invention is provided, it is proposed that a kind of electrical energy router realizes AC and DC microgrid group energy amount
The design of two-way flow, is interconnection and energy compatibility between AC/DC microgrid group, and support AC and DC power network is reliable and stable
Power supply, there is provided research platform.
Brief description of the drawings
Fig. 1 is a kind of structural representation of alternating current-direct current microgrid group operation control test system of the invention；
Fig. 2 is alternating current-direct current energy router circuit connection in a kind of alternating current-direct current microgrid group operation control test system of the invention
Figure；
Fig. 3 is multiterminal element converter circuit connection in a kind of alternating current-direct current microgrid group operation control test system of the invention
Figure.
Specific embodiment
Specific embodiment of the invention is elaborated below in conjunction with the accompanying drawings.
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The all other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
A kind of alternating current-direct current microgrid group's operation control test system that the present invention is provided, as shown in figure 1, including：
First direct-current micro-grid, the second direct-current micro-grid, the first exchange microgrid, the second exchange microgrid, first line impedance, second
Line impedance, the first AC/DC converter, the second AC/DC converter, experimental power supply, alternating current-direct current energy router, multiterminal element
Converter and switch；
Wherein, the switch k1 that is sequentially connected, experimental power supply and switch k2 be parallel to power network bus and microgrid power supply buses it
Between, switch k3 be parallel to microgrid power supply buses and first exchange microgrid bus between, switch k4 be parallel to microgrid power supply buses with
Between second exchange microgrid bus, the tie point that switch k3 is exchanged between microgrid bus with first is sequentially connected First Line roadlock
Anti-, switch k5 and switch k4 are exchanged between microgrid bus with second, the switch k6 being sequentially connected and first exchange microgrid and first
Exchange microgrid bus is in parallel, and the switch k7 and the first AC/DC converter being sequentially connected are parallel to the first exchange microgrid bus and the
Between one direct-current micro-grid bus, the exchange microgrids of the switch k11 being sequentially connected and second exchange the parallel connection of microgrid bus with second, successively
The switch k10 and the second AC/DC converter of connection are parallel between the second exchange microgrid bus and the second direct-current micro-grid bus,
The switch k16 and the first direct-current micro-grid being sequentially connected are in parallel with the first direct-current micro-grid bus, the switch k17 being sequentially connected and second
Direct-current micro-grid is in parallel with the second direct-current micro-grid bus, the first direct-current micro-grid bus successively with the second line impedance, switch k13, many
End direct current transducer, switch k15 and the series connection of the second direct-current micro-grid bus, the one end for switching k8 exchanges microgrid bus simultaneously with first
Connection, the other end for switching k8 is connected with alternating current-direct current energy router, and the one end for switching k9 exchanges the parallel connection of microgrid bus with second, opens
The other end for closing k9 is connected with alternating current-direct current energy router, and alternating current-direct current energy router is changed by switching k14 with multiterminal element
Device is connected.
Micro-capacitance sensor, refers to by distributed power source, energy storage device, energy conversion device, associated loadings and monitoring, protection device
The small-sized electric system collected, is an autonomous system that can realize self-contr ol, protection and management, both can be with
External electrical network is incorporated into the power networks, it is also possible to isolated operation.Direct-current grid just is with what direct current mode was transmitted, is transmitted with exchange way
Just cry exchange micro-capacitance sensor.
For example, the first exchange micro-capacitance sensor includes:1 set of energy-type cells, 1 set of power type battery, 1 set of polymorphic type load, even
Connect 1 set of photovoltaic generation, K7 connection AC/DC convertors and the interconnection of the first direct-current micro-grid；
Second exchange microgrid includes:1 set of polymorphic type load, 1 set of diesel generation simulator, 1 set of light stores up integral system, 1
Set power type battery, K10 connection AC/DC convertors and the interconnection of the second direct-current micro-grid；
First direct-current micro-grid of 400V includes:1 set of energy-type cells, 1 set of photovoltaic generation, 1 set of DC load；
Second direct current network of 800V includes:1 set of energy-type cells, 1 set of photovoltaic generation, 1 set of DC load；
Specifically, the experimental power supply is AC/DC/AC power supplys, for receiving power network alternating current, and power network alternating current is passed through
After handing over straight exchange conversion, the alternating current of separately adjustable three-phase voltage/frequency is capable of in output.
The alternating current of the power network bus, microgrid power supply buses, the first exchange microgrid bus and the second exchange microgrid bus
Pressure is 0.4kv, and the DC voltage of the first direct-current micro-grid bus is 400v, and the DC voltage of the second direct-current micro-grid bus is
800v。
Further, the alternating current-direct current energy router, as shown in Fig. 2 including：First AC port, the second exchange end
Mouth, the 3rd AC port, the first AC/DC convertor, the second AC/DC convertor and DC converter, the first AC port warp
Cross the first AC/DC convertor in parallel with common DC bus, direct current is female together by the second AC/DC convertor for the 3rd AC port
Line parallel, the second AC port is in parallel with common DC bus by DC converter；
The multiterminal element converter, as shown in figure 3, including：First DC port, the second DC port, the 3rd direct current
Port, a DC/DC converters, the 2nd DC/DC converters and the 3rd DC/DC converters, the first DC port, the second DC terminal
Mouthful and the 3rd DC port respectively through a DC/DC converters, the 2nd DC/DC converters and the 3rd DC/DC converters together
Dc bus is in parallel.
First direct-current micro-grid bus successively with the second line impedance, switch k13, multiterminal element converter the first DC terminal
Mouth series connection, the second DC port of multiterminal element converter is connected with switch k15 with the second direct-current micro-grid bus successively, and multiterminal are straight
3rd DC port of stream transformer is sequentially connected the second AC port of switch k14 and alternating current-direct current energy router, switchs k8
One end the first AC port of microgrid bus is in parallel, switchs k8 the other end and alternating current-direct current energy router exchanged with first connect
Connect, the one end for switching k9 exchanges the parallel connection of microgrid bus with second, switch the other end and the 3rd of alternating current-direct current energy router of k9
AC port is connected.
The alternating current-direct current energy router, for the input work by adjusting the first AC port and the 3rd AC port
Rate, controls the power output of the second AC port, wherein, the input of power output=the first AC port of the second AC port
The input power of the AC port of power+the three；
The alternating current-direct current energy router, is additionally operable to the input work by adjusting the second AC port and the 3rd AC port
Rate, controls the power output of the first AC port, wherein, the input of power output=the second AC port of the first AC port
The input power of the AC port of power+the three.
The multiterminal element converter, for the input power by adjusting the second DC port and the 3rd DC port,
The power output of the first DC port is controlled, wherein, the input work of power output=the second DC port of the first DC port
The input power of the DC port of rate+the three；
The multiterminal element converter, is additionally operable to the input work by adjusting the first DC port and the 3rd DC port
Rate, controls the power output of the second DC port, wherein, the input of power output=the first DC port of the second DC port
The input power of the DC port of power+the three；
The multiterminal element converter, is additionally operable to the input work by adjusting the first DC port and the second DC port
Rate, controls the power output of the 3rd DC port, wherein, the input of power output=the first DC port of the 3rd DC port
The input power of the DC port of power+the second.
Controlling switch k1 builds alternating current-direct current microgrid group's operation control test environment to the state that is opened or closed for switching k17.
For example, default switch k1 is off to k17 is switched, closure switch K1, switch K2, switch K4, switch K5
With switch k6, build and powered test environment through the first exchange microgrid end of long range alternating current circuit impedance；
Default switch k1 to switch k17 be off, closure switch K5, switch K6 and switch K11, microgrid will be exchanged
Interconnected by alternating current circuit impedance, built microgrid group's energy compatibility test environment；
Default switch k1 is off to k17 is switched, closure switch K1, switch K2, switch K3, switch K6, switch
K7 and switch k16, builds the nested coordination control test environment of alternating current-direct current microgrid；
Closure switch k8, switch k9, switch k14, switch 13 and switch 15, can be micro- by the first exchange microgrid and the second exchange
Energy interconnection is carried out between net and the first direct-current micro-grid and the second direct-current micro-grid, can also by three ends differences voltage DC power network it
Between interconnect, so as to coordinate test environment or direct-current micro-grid team control test environment between building friendship straight microgrid group.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention rather than its limitations, to the greatest extent
Pipe has been described in detail with reference to above-described embodiment to the present invention, and those of ordinary skill in the art should be understood：Still
Specific embodiment of the invention can be modified or equivalent, and without departing from any of spirit and scope of the invention
Modification or equivalent, it all should cover within claims of the invention.
Claims (8)
1. a kind of alternating current-direct current microgrid group operation controls test system, it is characterised in that the system includes：
First direct-current micro-grid, the second direct-current micro-grid, the first exchange microgrid, the second exchange microgrid, first line impedance, the second circuit
Impedance, the first AC/DC converter, the second AC/DC converter, experimental power supply, alternating current-direct current energy router, multiterminal element conversion
Device and switch；
Wherein, switch k1, experimental power supply and the switch k2 being sequentially connected are parallel between power network bus and microgrid power supply buses, are opened
Close k3 to be parallel between microgrid power supply buses and the first exchange microgrid bus, switch k4 is parallel to microgrid power supply buses and second and hands over
Between stream microgrid bus, the tie point that switch k3 is exchanged between microgrid bus with first is sequentially connected first line impedance, switch
K5 and switch k4 are exchanged between microgrid bus with second, and the exchange microgrids of the switch k6 being sequentially connected and first exchange microgrid with first
Bus is in parallel, and the switch k7 and the first AC/DC converter being sequentially connected are parallel to the first exchange microgrid bus and the first direct current is micro-
Between net bus, the exchange microgrids of the switch k11 being sequentially connected and second exchange the parallel connection of microgrid bus with second, and what is be sequentially connected opens
Close k10 and the second AC/DC converter is parallel between the second exchange microgrid bus and the second direct-current micro-grid bus, be sequentially connected
Switch k16 and the first direct-current micro-grid it is in parallel with the first direct-current micro-grid bus, the switch k17 being sequentially connected and the second direct-current micro-grid
In parallel with the second direct-current micro-grid bus, the first direct-current micro-grid bus turns with the second line impedance, switch k13, multiterminal element successively
Parallel operation, switch k15 and the series connection of the second direct-current micro-grid bus, one end for switching k8 exchange the parallel connection of microgrid bus with first, switch k8
The other end be connected with alternating current-direct current energy router, switch k9 one end exchange with second microgrid bus parallel connection, switch k9 it is another
One end is connected with alternating current-direct current energy router, and alternating current-direct current energy router is connected by switching k14 with multiterminal element converter.
2. the system as claimed in claim 1, it is characterised in that the experimental power supply is AC/DC/AC power supplys, for receiving electricity
Net alternating current, and by power network alternating current after handing over straight exchange conversion, the exchange of separately adjustable three-phase voltage/frequency is capable of in output
Electricity.
3. the system as claimed in claim 1, it is characterised in that the power network bus, microgrid power supply buses, the first exchange microgrid
The alternating voltage of bus and the second exchange microgrid bus is 0.4kv, and the DC voltage of the first direct-current micro-grid bus is
400v, the DC voltage of the second direct-current micro-grid bus is 800v.
4. the system as claimed in claim 1, it is characterised in that the alternating current-direct current energy router includes：First AC port,
Second AC port, the 3rd AC port, the first AC/DC convertor, the second AC/DC convertor and DC converter, first
AC port is in parallel with common DC bus by the first AC/DC convertor, and the 3rd AC port is by the second AC/DC convertor
In parallel with common DC bus, the second AC port is in parallel with common DC bus by DC converter；
The multiterminal element converter includes：First DC port, the second DC port, the 3rd DC port, a DC/DC become
Parallel operation, the 2nd DC/DC converters and the 3rd DC/DC converters, the first DC port, the second DC port and the 3rd DC port
It is in parallel with common DC bus respectively through a DC/DC converters, the 2nd DC/DC converters and the 3rd DC/DC converters.
5. system as claimed in claim 4, it is characterised in that the first direct-current micro-grid bus successively with the second line impedance, open
Close the first DC port series connection of k13, multiterminal element converter, the second DC port of multiterminal element converter successively with switch
K15 and the second direct-current micro-grid bus are connected, and the 3rd DC port of multiterminal element converter is sequentially connected switch k14 and alternating current-direct current
Second AC port of energy router, one end for switching k8 exchange that microgrid bus is in parallel with first, the other end of switch k8 and
The first AC port connection of alternating current-direct current energy router, one end for switching k9 exchanges the parallel connection of microgrid bus with second, switchs k9
The other end be connected with the 3rd AC port of alternating current-direct current energy router.
6. system as claimed in claim 4, it is characterised in that the alternating current-direct current energy router, for by regulation first
The input power of AC port and the 3rd AC port, controls the power output of the second AC port, wherein, the second AC port
Power output=the first AC port the AC port of input power+the three input power；
The alternating current-direct current energy router, is additionally operable to the input power by adjusting the second AC port and the 3rd AC port,
The power output of the first AC port is controlled, wherein, the input work of power output=the second AC port of the first AC port
The input power of the AC port of rate+the three.
7. system as claimed in claim 4, it is characterised in that the multiterminal element converter, for straight by regulation second
The input power of flow port and the 3rd DC port, controls the power output of the first DC port, wherein, the first DC port
The input power of the DC port of input power+the three of power output=the second DC port；
The multiterminal element converter, is additionally operable to the input power by adjusting the first DC port and the 3rd DC port, control
The power output of the second DC port is made, wherein, the input power of power output=the first DC port of the second DC port+
The input power of the 3rd DC port；
The multiterminal element converter, is additionally operable to the input power by adjusting the first DC port and the second DC port, control
The power output of the 3rd DC port is made, wherein, the input power of power output=the first DC port of the 3rd DC port+
The input power of the second DC port.
8. the system as claimed in claim 1, it is characterised in that controlling switch k1 is opened or closed state, structure to switch k17
Direct-current micro-grid of establishing diplomatic relations group's operation control test environment.
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| CN201611085627.7A CN106786732B (en) | 2016-11-30 | 2016-11-30 | AC/DC micro-grid group operation control test system |
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| CN201611085627.7A CN106786732B (en) | 2016-11-30 | 2016-11-30 | AC/DC micro-grid group operation control test system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011304A (en) * | 2019-04-15 | 2019-07-12 | 国网山西省电力公司大同供电公司 | A kind of self-optimizing route system in switching group network planning stroke |
| CN114744607A (en) * | 2022-04-27 | 2022-07-12 | 厦门大学 | Flexible interconnection framework of serial-type direct current microgrid group |
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| CN114744607B (en) * | 2022-04-27 | 2024-06-04 | 厦门大学 | Series connection type direct current micro-grid group flexible interconnection architecture |
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| CN106786732B (en) | 2020-12-25 |
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